Gas stove



May 19, 1931.

F., A. GERCICH GAS STOVE Filed Nov. 17, 1927 INVENTOR. FREDERICK II. General BY gm- M A TTORNEY Patented May 19, 1931 UNITED STATESPATENT OFFICE FREDERICK A. GERCICH, OF OAKLAND, CALIFORNIA, ASSIGNOR TO HAMMER-EBAY COM- PANY, OF OAKLAND, CALIFORNIA, A CORPORATION OF CALIFORNIA GAS srrovn Application filed November 17, 1927. Serial No. 233,864.

The invention relates generally to a closed top gas stove having means provided in the top-gas-burner chamber thereof for controlling the supply of secondary air to the burners in said chamber, and more particularly to the structure of said means and the support of said burner in the-chamber. This application is related to my original application Serial No. 186,610, which was filed in the Patent Office on April 26, 1927, the present application relating more particularly to the embodiment illustrated in Figure 4 of said original application.

An object of the invention is to provide a gas stove structure in which the means for controlling the secondary air supply to the vburners provides the support for the burners.

Another object of the invention is to provide a structure whereby the independent and ready removal and installation of the burners is provided for.

The invention possesses other objects and features of advantage, some of which, with the foregoing, will be set forth in the following description of the preferred form of the invention which is illustrated in the draw ings accompanying and forming part of the specification. It is to be understood, however, that variations in the showing made by the said drawings and description may be adopted within the scope of the invention as set forth in the claim Referring to said drawings,

" Figure 1 is a fragmentary plan view of a stove embodying the structure of my invention and havin the cooking-stop lid-plate thereof removed.

Figure 2 is a sectional view taken on the line 2-2 in Figure 1.

Figure 3 is an enlarged fragmentary sectionial view taken on the line 3-3 in Figure y Figure 4 is a View similar to Figure 3 showing a different embodiment'of the invention, the cooking-top lid-plate being omitted.

As herewith particularly disclosed, the means of my invention-is incorporated with a gas stove 6 having a cooking top 7 beneath which is defined a burner compartment 8 in which are suitably mounted front and back burners 9 and 11 respectively. The compart-' ment 8, it will be noted, is defined between side walls 12, a front wall 13, a back wall 14, a bottom wall 15 and the cooking top 7. Fresh air is arranged to be admitted to said com partment to escape from the compartment at a point adjacent the cooking top+as here shown, the side and bottom walls of the compartment are imperforate, while the front and backwalls are perforated to provide respectively for the ingress and egress of fresh air and vitiated air. The cooking top 7 is of a usual structure and comprises a removable lid-carrying section 16 mounted on a rim section 17 forming a fixed part of the stove, it being noted that the section 16 overlies the various burners of thecompartment 8. Preferably, and as here shown, the burners 9 and 11 are of a type having their jets projected upwardly from the top surfaces 18 thereof.

Mounted in the compartment 8 is a member 19, such member having a bottom plate portion 21 disposed slightly above the plane of the burner surfaces 18, and provided with circular openings 20 over the burners to allow the protrusion therethrough of the flame jets of the burnersin practice, it has been found that the positioning of the plate 21 about oneeighth of an inch above the burner surfaces 18 is best. As here shown, the plate 19 is of substantially the same size and shape as the top section 16 and is provided at the edges thereof which are respectively opposlte the side walls 12 and front wall 13 with wall portions 22 extending upwardly of the plate portion 21. Preferably, the walls 22 are coterminous and extend to and against the top rim section 17 and are secured thereto in any suitable manner whereby they serve to entirely support the mem er .19 in the coinpartment with'plate 21 in its operative position. 'The plate 21 preferably extends to and against the "perforated baok wall 14 of the compartment, it being noted that when, .as here shown, the vent opening 23 of such wall extends below the level of the plate 21, a back edge portion 24 of the latter is deflected downwardly to register with the bottom edge of the opening. In this manner, the member 19 cooperates with the cooking top to define therewith a heating chamber havirig its only tions purely as an air supply chamber.

As herewith particularly disclosed, the support of the member 19 from the cooking top rim section 17 is effected by providing depressed portions 27 in a s'eatb 28 provided I around the perforation of section 17 for the reception of the removable top section 16, in which seat portions lateral extensions 29 provided at the top of the plate portions 21 of the member 19 are arranged to be disposed. In this manner, the removable support of the member 19 from the rim section 17 is provided independently ofand does not interfere with the mounting of the top section 16 theremember 31 is mounted in each of the openings 20 of plate 21, and is so formed that air passing through the passage provided thereby will be guided into the flame space of the jetsabove the different burners. In the present embodiment of the invention in which the burners shownare provided with arms-32 radiatingfrom a common center and having er arms 32. Preferably, and as here shown,

rows of jets 33 extending longitudinally therealong, the conduit passage 34 is of the general outline of the burner and is formed with portions 36 overlying the different burn,

the passage portions 36 are no wider at their inlet ends than the adjacent portionsofthe arms which they overlie, and may, to advantage, be even narrower. I In this mannr,

the air passing upwardly around the burner arms and into the passage is directed transversely against the jet flames, whereby all of the oxygen of the air passing through the conduit is made available at the burner flames to insure complete combustionthereat. Preferably, and as here shown, the exitend of each passage 34 is disposed substantially at the plane of the tips of the combustion cones of the burner flames when such are of full size,so that vitiated air from one burner may not interfere with the combustion at another burner, it being noted that the flame space of the passage 34 and having a continuous wall 38 of substantially uniform thickness extending upwardly from around its perforation to define the passage 34, it being noted that .and 3,,are provided with one or more webs ers and members may be properly spaced Preferably, and as here shown, a conduit the folds of said walls define arm portions 39' thereof which provide the passage portions 36 overlying the diflerent burner arms, In this manner, the conduit members are arranged to be of a minimum weight. The peripheries of the bases 37 are arranged for disposal in depressed annular seats 41 provided in the edges of the perforations 20 whereby the members 31 are held against shifting over the plate surface. To insure a correct positioning of the conduit members in the seats 41, extensions 42 are provided on the plate 21 at each of the seats 41, such ex- 13611510118 being directed radially inwardly for engagement with notches provided in the 30 edges of the conduit base portions 37.

The burners, it will be noted, are also arranged to be supported from the plate 21, and, as particularly disclosed in Figures 1, 2 A 43 connecting adjacent arms 32 thereof whereby they may be secured. to the members 31 asby bolts 44, spacing bosses 45 bein provided on the members31 whereby the urnapart. If desired, the burners may be supported directly from the partitioning'memher, as is disclosed in the embodiment of Figure 4 In the latter embodiment, lugs 46 are provided on the burners 47, which lugs are arranged to be disposed in depressed portions 48 of the seats 49 provided in plate 21 for the reception of the bases 51 of the conduit members 31'. To prevent a relative rotative displacement of the members 31' 1 with respect to the burners, the former are preferably provided with depending lugs 52 which are-arranged to engagebetween adjacent burner arms 32- when the members are properly disposed with respect tothe burners. In this manner, separate supporting means for the burners are rendered unnecessary.

In the present embodiment ofthe inven tion, the partitioning member is arranged to the member 19 is perforated as at 54' to receive the lighter 54 in position to discharge toward the various burners. Owing to the, fact that the flame jets are above the plane of the plate 21, however, it is obviously .desir- 'able to provide special conduits leading from the lighter toward the burners and discharging through the conduit members 31 at the appropriate level. As here shown, the necessary conduits are provided directly in the plate 21 by forming the plate with generally semi-cylindrical grooves 55 extending upwardly of the lowe'rplane of the plate 21 zfnd opening'downwardly, such grooves terminatixig at the conduit member perforation and opposite conduit arms 39 which are apthrough the perforations 20. But when, as

is desirable and usual, the chamber 26 is relatively shallow, the relatively long lead pipes 51 of the rear burners which form integral parts of the burner structures would serve to prevent the insertion or removal of the burner while the member 21 is in its place. And,

' furthermore, an adjacent oven'wall'56 or the splasher back 57 of the .stove would still .fur-' th'er hinder the insertion or removal or arear burner. Means are accordln ly provided for facilitating the removal-or insertion of a rear burner through a perforation20, and as here shown, such means compr1ses,forming the member 19 with front and rear sec tions 64 and 66 respectively, whereby with i and 66, with the line of division lying genthe rear section 66 only in place, a rear burner may be removed or operatively positioned by moving it substantially vertically with re spect to its operativeposition. Preferably, and as here shown,the member 19 is divided transversely thereof to define the sections 64 erally forwardly of the rear burners and passing through each of the rear perfora-v tions 20.

Preferably, and ashere shown, the abut ting edge .portions 67 and 68 of the sections 64 and 66 respectively arearranged to overlap each other in such manner that a certain degree of mutual support is provided by the sections when they are engaged. As here shown, the forward edge portion 69 of the rear section 66 which is defined between the pair. of rear perforations is arranged to be disposed in a seat 71 provided in the opposed edge portions 72 of the front section 64, the edge portions 73 of the section 64 which define parts of the perforations 20 are provided with portions 7 4 of the seat 41, and

the remaining rear edge portions of the section 64 are arranged to be disposed in seats 76. provided in" the opposed front edge portions 77 of the rear section 66.

It will, of'course, now be obvious that the gap thus provided in the seat 41 when the section 64 is removed from its cooperative engagement with section 66 need only be ide enough to permit the lowering of the bIIIXfiSI lead pipe 51 therethrough. Preferably, a d as here shown, the seat portions 74 are'provided in those portions of the section 64 which include the extremities'of the lighter conduits 55, which conduit ends are here shown disposed substantiall the I front section edge portions 3 inwhich seat portions 74 are provided-in this manner,

the lightingmeans is arranged to be carried entirely by the front section, '64. And it will be further noted that the line of division between the sections is-preferably carried as far forwardly as possible whereby the front section may weight. i

Assembly of the structure described is arranged to be effected ina simple manner.

be of the least possible With the lid plate 16 removed from the stove top, the section 66 ismounted in the rim section 17 by disposing its extensions 29 in,

the seat portions 27., Having secured conduit members 31 to the rear burners 11, these burners are then lowered into the compartment 8 to-engage the conduit baseportions 37 in the seats 41.v The section 64 is then placed in position,- it being noted that its rear edge must be engaged with cooperating front edge of section 66 and the conduits of the rear burners before the front of-the section can be lowered to its set position. Insertion of the .front burners and their conduits is now per-' .mitted, after which the lid plate 16 may be disposed in its opening. Removal of the burners would, of course, be effected by a reversal of the order of'the before des'cribed steps. It will be notedzthat with the embodiment of Figure i -the operative-disposition of all of the burners in seated position is arranged to be effected independentlyof the conduits, the latter being placed in-position after the burners and sections 64 and 66' are in place.

Qwing to the concentration of'heat at the vent opening 23 whereby the rear portion of plate 21 and the underlying portion of chamber 26 maybecome unduly heated, inlet openings 79 arealso preferably provided in the rear wall .14 of the compartment 8 and below the plate 21, whereby air may'enter the chamber 26- fromithe rear ofrthe compartment, such air primarily serving to provide the rear burners with the necessary air for use thereat. In this manner, the circulation of air induced along the rear of plate 21 will provide a coolin of the plate and chamber and a corresponding preheating of such air.

I claim:

1-. In a stove havinga top-gas-burner compartment defined b'eneatha closed cooking top, a member dividing said compartment partment defined beneath a closed cooking top; a member dividing said compartment end substantially coplanar with said member into upper and lower chambers and having a perforation therein providing a seat at the edge thereof; a burner removably mounted in said seat and disposed entirely below the plane of said member; and a conduit member removably mounted in said seat with its lower and arranged to direct the air flowing upwardly through said perforation into the flame space above said burner.

3. In a stove having a top-gas-burner compartment definedbeneath a closed cooking top, a member disposed in said compartment to divide the same into upper and lower chambers and having a perforation provided with a seat around the edges thereof,.a burner disposed in said compartment and directly and removably supported in said seat, a conduit member removably mounted in said seat independently of said burner and operative to direct the air flowing upwardly through said perforation into the combustion space directly above said burner, and a means integral with said conduit member for preventing only the angular displacement of said last member with respect to said burner.

4. Ina stove having a top-gas-burner.compartmen't defined beneath a closed cooking top, a member dividing said compartment into upper and lower chambers and having a perforation through a horizontally disposed portion thereof, a seat at and encircling said perforation and having depressed portions, 'a burner disposed in said compartment and directly and removably supported in the depressed portion-s of said seat, and a conduit member removably mounted in said seat arranged to direct the air flowing upwardly through said perforation into the combustion space above said burner, and provided with a means for preventing only the angular displacement of said conduit member with respect to said burner.

In testimony whereof, Ihave hereunto set my hand at Oakland, California, this 5th day of November, 1927.

FREDERICK A. GERCICH. 

